Chuck.



T. J FEGLEY.

CHUCK.

APPLICATION FILED APR. 9,1908.

948,850. Patented Fens, 1910.

UNTTED STATES PATENT @EFIQE.

THOMAS J. FEGLEY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO NORTH BROSMFG 00., OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

CHUCK.

Specification of Letters Patent.

Application filed. April 9, 1908.

Patented Feb. 8, 1910.

Serial No. 426,145.

To all whom it may concern."

Be it known that I, THOMAS J. FEG EY, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Chucks, of which the following is a specification.

The object of my invention is to improve the construction of chucks soas to make the perspective view of the body portion; Fig. 4,

is a detached perspective view of the shell; Fig. 5, is a perspectiveview showing the jaws and their parts detached; Fig.5, 1s a perspectiveview of the spindle; Fig. 7 is a sectional view of the carrier; and Fig.8, is a sectional view of one of the jaws.

A is the body of the chuck having, in the present instance, three radialslots at for the reception of the jaws B. The body is threaded at therear end a and fitting over the body is the shell G having an internalscrew thread adapted to the threaded portion a of the body A. The shellis prevented from turning on the body portion by a screw 0. Both thebody and the shell are tapered at the outer end, as shown, and each jawis tapered at b on the same line as the taper c of the shell, so thatthe jaws will travel forward and back on this surface of the shell. Thebody portion has a longitudinal opening throughout its entire length andthis opening is thread ed also throughout its entire length and adaptedto the opening is the spindle D; the inner portion (Z of this spindlebeing threa ded and meshing with the threads of the body portion.

E is a carrier having three arms 6 which fit in the body portion; thearms projecting into the slots a. The end of the spindle D rests againstthe back of this carrier and the rear portion 6 of each jaw B is taperedto fit the tapered face 6 of the carrier, so that as the jaws are pushedforward by the spindle D they will slide at one end upon the carrier andat the other end upon the inclined portion of the sleeve. Each arm 0 ofthe carrier is slotted at e and has a hole 6 for the reception of thespring 2'. The end portion 2" of this spring extends into the hole 6while the hooked portion 2' passes into a slot 6 in the jaw 13 andengages a pin 6 This spring is so shaped as to tend to draw the jawoutward, thus holding each jaw firmly against the two inclined bearingsurfaces, one on the carrier and the other on the shell.

In assembling the chuck, the jaws are assembled on the carrier and thesprings hooked into position and the carrier with its jaws inserted inthe body portion, then the sleeve is screwed onto the body portion andsecured by a confining screw 0.

In operating the chuck all that is necessary is to turn the body portionon the spindle D. By turning it in one direction the carrier will bemoved forward, forcing the jaws toward each other, and if there is ashank of a tool in the chuck the jaws will grasp it firmly; and byturning the body portion in the reverse direction the jaws will be movedback from the tool by the springs and can be readily withdrawn from thechuck.

I claim:

1. The combination in a chuck of a body portion having three radialslots, a sleeve internally tapered at one end and secured to the bodyportion so as to form an outer jaw bearing, a relatively flat carrierprovided with laterally projecting slotted arms extending into theradial slots of the body portion and having a concave face, there beinga spring-holding recess in each of the arms, in addition to its slot, ajaw mounted in each slot of the body portion and beveled at each end,one end of each jaw fitting against the tapered face of the carrier andthe other fitting against the tapered end of the sleeve, springsrespectively mounted in the slots of the carrier arms and acting toforce the jaws apart while holding their beveled ends against thecarrier and the sleeve, each spring having one end turned over andinserted in the spring holding recess of its arm, with a centrallythreaded spindlefitting a threaded opening in the body portion andbearing against the carrier.

2. The combination of a body portion, a shell inclosing the body portionand having a tapered end, radial slots at one end of the body portionand a central opening eXtending throughout the length of the chuck andconnecting with the slots, a carrier having a head portion mounted inthe central opening and having arms adapted to the radial slots, eacharm being slotted at the outer end and having a hole adjoining the slot,the forward end of the carrier being beveled, jaws adapted to the radialslots, each jaw being beveled at each end, one bevel fitting the bevelof the carrier, the other fitting the conical portion of the shell, theback of each jaw being grooved, a pin extending across the groove, aspring for each jaw, each spring being bent at one end to pass into thehole and rest in the slot, the other end of the spring being hooked toengage the cross bar in the jaw, and a screw threaded spindle adapted tothe threaded central opening in the body portion so that on the turningof the spindle in one direction the carrier will be forced forwardcausing the jaws to move toward the center, and when the spindle isturned in the reverse direc tion the springs will retract the jaws.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

THOMAS J. FEGLEY.

Witnesses Jos. H. KLEIN, \VM. A. BARR.

